The code block formatting is currently broken on the forums (here is an example).
It can be very easily fixed by removing a line in the stylesheet.css, look for :
.codebox code {
overflow: auto;
display: block;
height: auto;
max-height: 200px;
white-space: normal;
font: 1em Monaco, "Andale Mono", "Courier New", Courier, mono;
line-height: 1.5em;
margin: 0;
}and remove white-space: normal; from this block.